Double-end tenoner



Nov. 2, 1943. Q H, MANsFlELD 2,333,542

DOUBLE-END TENONER Filed May 5, 1941 5 Sheets-Sheet 1 INVENTOR. Jaabam arwy'ld BY gud NOV- 2, 1943. J. MANsr-'IELD `DOUBLE-END TENONER Filed May 5, 1941 5 Sheets-Sheet 2 P LLELClrErr-t.

lll Il L INVENTOR Jadfofz/ Vmp'e Nov. 2, 1943. J. H. MANSFIELD 2.333.542 Y DOUBLE-END TENONER Filed May 5, 1941 5 Sheets-Sheet 5 l 1N VENTOR.

Nov. 2, 1943.- J. H. MANsFlELD 2,333,542

DOUBLE-END TENONER Filed May 5, 1941 5 sheets-sheet 4 1N VENTOR.

Noi 2, 1943 v J. H. MNsx-'IELD v 2,333,542

DOUBLE-END TENONER Filed may 5, 1941 5 sheets-sheet 5 RMU Patented Nov. 2, 1943 Aiiiiliohtioii Mays, 1941, seiiel No. 391,849

thereto, enh witliiiieehe for ehohgiiigthe angle' f' As shown in Figure 1, the machine includes a base I upon which there is supported a pair of substantially rectangular upright standards 2, 2 spaced apart to provide room between them for the work feeding means. This includes a pair of feed chains 3, only one of which is shown in Figure 1, and a pair of rubber-padded hold-down chains 4, of which only one is sho-wn in Figure 1. The chains 3, traveling overhorizontally extending ways 3a, constitute a feed bed upon which the work-pieces, such as the members A, A, are supported and advanced, and as they move through the machine the pieces A, A are maintained in position on the chains 3 by the chains 4 which travel at the same speed. Suitable angle lugs are secured to the feed chains 3 at intervals to provide driving engagement with the work A. It may be understood Ythat each of the standards 2 will support suitable rotary cutters each provided with its individual driving motor; Figure 1 shows the motor 6, the shaft of which serves as an arbor for one `suchrcutter which operates to square the ends A3 of the work-pieces A; and at 1 and 8 there may be seen the driving motors having shafts which constitute the arbors for cutters which form the grooves A2 in the workpieces. Each of the motors 1 and 8 is supported by a bracket 9 projecting from a slide I0 which is adjustable transversely of 4the machine in suitable guideways Il, and these guideways are, in turn, formed on heads I2 which are vertically adjustable on the face I3 of the standard 2. The means for effecting such vertical adjustment is not shown in detail, as it is nota part of the present invention, but it may be understood that such means will serve to raise or lower the cutters I4 driven by the motors 'I and 8 so as to determine the depth of the grooves A2 to be formed thereby. l

As indicated in Figure 2, the cutters I4lmay be composed of groups of toothed disks in the nature of circular saws secured 4to the shafts or arbors I5 of the motors 1 and 8, and said shafts I5 are set parallel to each other but in oblique relation to the direction of straight-line travel of the feed chains 3 so that the cutter disks I4 stand in planes parallel to the sides A4 of the grooves A2. Each of the motors 1 and 8 is secured to itssupporting bracket 8 by a pivot I5, and is provided with a gear segment I1 meshing with a worm I8 which is journaled in the bracket 9; thus the rotation of the worm serves to adjust the motor about its pivot VI6 for setting the cutters-I4 at the desired angle. Such adjustment is effected by applying a suitable wrench or handle to a squared shaft I 9 having a spiral gear 2D which meshes with a spiral -gear 2I on the shaft of the worm I8.

Since the cutters I4 rotate in planes oblique to the direction of travel of the chains 3 and the Work-pieces A carried thereby, and since the effective width of each cutter I4 is the same as the width of the grooves A2 to be formed thereby, it is necessary that either the work-piece A or the cutter I4 be -moved transversely of the direction of travel of the work as the cutting action proceeds in order that the oblique groove may be formed as desired. In other words, if, for example (referring to Figure 4), the leading corner A5 of :the groove A2 is one-half inch nearer to the squared end A3 than the trailing corner A6 of the groove, then, during the cutting operation, as the work is fed forward through the machine by the chains 3, a simultaneous cross-feed of One-half inch must be accomplished.

In the present construction the cross-feed isapplied to the cutters I4 by movement of the supporting brackets 9 and their slides I0 in the guideways II. Each of the slides I0 carries a pivot 22 through which there extends a rod or link 23 provided with suitable shoulders or collars 24 engaging opposite sides of the pivotl 22. The rod 23 is threaded for adjustable engagement in a transversely threaded pivot or wrist pin 25 which is carried in a bifurcated crank arm 26 splined to a vertical rock shaft 21 journaled in bearings 28 secured to the outer face of the upright standard 2. The splined connection between the shaft 21 and the crank arms 26 permits the vertical adjustment of the heads I2 for varying the cutting depth as already mentioned.` By means of a hand wheel 29 on the threaded'. link rodV 23 the rod may be rotatably adjustedv through the wrist pin 25 to determine the exact position of Ythe slide l0 to which it is connected by the* pivot 2,2fo/,r` properly locating the cutter I4 andfits motorv which the.slide supports.

Thus by swinging the rock shaft A21 and its crank arms 2,6 through a.v limited angle as the work-piece A` is progressing past the cutter I4,

the cuttermay be shifted transversely of the direction of travel of the workpiece by exactly the amount which corresponds to the Obliquity of the groove A2. This swinging movement of the rock shaft 21 is tr'ansmittedto the shaft by a link 30 havingone end-connected bya pin 3I8 to a crank arm 3| on the shaft`21, and having its opposite end connected by a pivot 32 to a crank arm 33 on a vertical shaft 34 (all of which is shown -in Figure 2). rI'he shaft 34 is actuated by apair vof camsl35and 36 (see Figure 6) engaginggfpllower rollers 31 disposed at opposite sdesQf theaXis of the cam shaft 38 and mounted in theffollower arm 39 keyedfto the shaft 34. Thecam shaft 38, as's'eenlin .Figure 5, is driven by 'means of a miter gearff40 on said shaft 38 meshing witha miter gear 4I on a horizontal shaft 42 whichextends across the machine and also serves to drive the feed chains 3.- Thus the motion transmitted through the cam shaft 38 and its follower shaft` 34 to the rock shaft 21 by means of link 30, and resulting in the transverse movement or cross-feed of the cutters I4, is positively timed. inrelation to the advance of the workpiece A as it is carried along by the chains 3.

Figures 5 and 9 show the driving motor 43 connected by a variable speed pulley 44 and-belt 45 to a' pulley 46 on a'shaft 41. The shaft 41 carries a pinion 48 meshing with a gear 49, and said gear, in turn, carries a `pinion 50 meshing with a gear 5I on the shaft 42, thus providing a suitable speed-reducing train for operating the feed mechanism of the machine. v

' T o vary the amount of movement transmitted to the link rod 23 for shifting the slide I8 and the cutter I4 transversely, the radial distance of the pivot 32'from the axis of the shaft 34 is made adjustable. The pivot is formed with a transverse threaded bore which engages an adjusting screw 52 extending radially in the crank arm 33, and the arm is formedwith a guide slot 53 in which the pivot member 32 is slidablysecured. A twist gear54 on the end of the screw 52 meshes with a twist gear 55 which is provided with a squared spindle 56 for the application of a suitable wrench or handle in eecting the adjustment. Thus while the rock shaft 34 and its arm 33 always swing through the same angle, the travel of the link 38 will depend upon the radial distance at which it is connected 'to the arm 33,I

and the amounti-i xkiiiovelilentf-wlilhlittransmits to 4the lerank ar-rn 34 :and `its rook Eshaft fll'may :thus bevaried, ats-desired. iltiwilllderiinderstood `that .any -ohange Y1in 1vthe 'position for the pivot 2 is accompanied fy a suitable adiustirnerrt of fthe outterfdrivinfgirnotors aboutitneir pivots L so that the angular position ofthe =oui-,ters t4 :shall eor respond to the amount o'f cro'ssfeedtprovidedhy the adjustment -fof Athe Tdni/.ingr-pivot- 32. 4.1n foriier that Y'these adjustments `shall correspond adourat'ely, the `'angular /positionfof eaohof theimotors -1 'and t and its shaiit for :arbor in relation Ito iifts supportingbracketfsis #indicate'd'hy aiseare Xfand a oooperatinig'index 'and' the Ianni sis fproviie'd with qgrradua'tioris IZ adjacent the f-guide'fslot '53 provided with `scale markings corresponding 'Eto those "off the scale X; preie'rabl-y, both-*scales JX andZ will'be'inarkedin terms o'f-de'greesindioating theian'gle of the cutters r4 itofthedireetioniof travel 1of :the `chains t; then the :opi-rater may readily set the machine to mit 'a groove-Yat ilie desired iangle by merely adju'stihgthefshafts I9 and 5S fs'o 'that the readings fof 'th-'e :scales for the two 'cutters M and thelre'ading -of the scale Z shall `all indicate-therselectedianglerofleut.

vAlthough fthe crank aarzrn 26, which' Aactua"tes the link rod 23, rcarries the pivdtnzslinanaro. A`or eieoting the transverse fstrok'e, this 'arcuate path of lthe pivotv2'5 deviates only :slightly trom 1a straight kline so :that if the rotationo ithe rock shaft 21 vwere'at auniformirateithe straightdine motion transmitted to the *slide t0 would 'heapproximately uniform. 'Sirnilarlygthefamitlirough which tliecriank pin 3lil 'swing'ssfof limited fextent, zand the fsame is tr'ue of the fivt 582 at the'otherendof link 136. Thferangeofimovement of the crankarmsf'tl and-33 is =such that neither of themfeveriswingsfariroina positionlappfoiiimately at right angles Ito fthe .link :30. Thus, L if the rotation of 'the rock shaft :Sily wr'e fstr'i'ctly uniform,the'motiohtransmittedffrom itloy way of the link 'en and Vrock fshaft V21 iwould .be very nearly uniform, sinceiiheobliquityidf thellnk' is so slight, even Iwhen its pivot 32 ffsadiustediat a 'maximum lradius on lthe' .arm '33, fas fshown iin' Figure 2. However-,since rthe motion "of therrook shaft 3d lis derived lfrom'th'e foams 35 Tand 536,' which are rotated 'continuously :in one Fdireoliion by the shaft f38, the cams may be "designed-to compensate v-for any 'irregularity "which knight otherwise `arise from fthe "Various 'arcuate move ments in the linkage fsoitlietith'eimotion 4rln'alli/ transmitted 'to the mCutters H .'for shifting them transverselyo'f the dil-'ecti'onof 'fee'd @tithe Werke piece Als ata-'substantiallyuniform rate which insures that the resultant path offthe hunters, fas traced upon the work-piece -Agwill'he'farstraiightline path ina direction 'obliqueto tlfiedi-lfetion of movement offthefeedichains :3. `Thetwo.ea-lios 35 v and V36 vare 'both keyed ito ther shari; 38 Aarid-"afrit in unison at'all'times"between:thevrollersfiliofthe follower `member 39.

In `the particular machin'e Tiere-'iin 7illi'istrated the feedfchains'are advancedithirty-"two inihes by :each rotation 'of the shaft '42, 'and 'the yuam shaft v3B is 'connected'totheishaftnlbytlle miter gears ill and 4l at a one-to-one ratio. Hence, the cycle 'of motions `controlled by the Teams on the shaft 3s will be repeatedonoezforeach revolution of the 'shaft 142, 'and it is therefore i'coll'ilvenerlt to provide 'lugs 5 fonthe chain-3 at 'intervals 'f thirty-'two inchesf'or presenting .the workepieces A in correctly .timed `relation to 'the operation of the mechanism 'controlled by :the `'c'iaitn fslalft' with ilugs :at fmore ifredueiitintervals, A'for fenample, fo'r l ?1$e'gtla3i f-te'l'fonirfg Work, 'for foricuttir'g groovesfifrlrlinefwithfthefdi'reotionfofifeeddikethe groove-AlI-ofthefpiece the. lugs whichla're prepa erly 4placed to ico'cme'ra'te 'with the rcross-feed meehanismlherein describe'dfmayf-be distinctively marked, as by painting them .-in Ara special color to Linsure proper 'placing 'of the work-pieces -lin the imaeliine.

`As alreadyindi'cate,=th`e depthl of theoutspro'- ducedbyithefcutters l M may be lvaried by'ivertical adjustmentof the heads il2,fand2thi's .maytbeleh fected independently lof `any other adjustment The :mechanism for raising and loweringthe heads -l 2 f is similar yto that shown :in Patent No. 1,711 1,275, Apreviously mentioned, andiinclude's the ooaxially mounted hand cwheels iin rvand '81 shown n'fFgure 1, whichm'ay fb'e understood-'as fg'ered toioper'ate vertioally'extending f'eedsorews'onemi which `is shown at 82 inF'gure 2 engaged with.

a threadedibracketiSS secured to the backl ottone of the heads l2. The 'fbfurcatedfcr'arilk alims 16, being lsplined -to the shaft 241, 'are operative 'et any .fpositionfof'vertic'al adjustment thereon, and each of these arm's'is disposedbetween upperahd lower flanges 84 which "e'Xt'end "rigidly from .the heads |12 and thus serve tooarrythe :crankiarms 26 upfor'down-'along the'shaft 21 rwhenfthe.fheafd's I2 'are vertically adjusted.

Since, for some purposes, lit 4lis 'desirable toi throw the crossefeed 4nreohahism out of `-service, themiter gear'dl isi-secured to the sha'tl'l by the engagement of a :clutch collar 60 lliavihg fa pair v'of .notches Bfl `and FB2 "which interni-einher with foooperating lugs 'rl and `i2 onithe end for the hulo 1U `of'tlle gearM. The clflltchliollar' vlill is provided with .key-ways y63 forrkeys `13wliioh connect the f collar "to the ish'aft 42. '-A "'set iscrew 64 in .the "collar .normally engages ia 'deterit ire# the two notches x60 and '161 are lof different Widths, being :formed 1oliidste rends ''f 'a tapered slot out across 'the follar, s'o 'that there is only one position attivi-rich tHey can be 'ei'li paged with the correspondingly fdiniensioned lugs 'Il Vand 12 of the-hub TLias Willbellopaiiit from Figures '7 and 18.

Preferably, in a lmachine of 'itl-iis htype *the vclitt'ers I4 `engage the work,"asfslowh in l'Fi'gure 10, the active 'Cutting teeth tI'f'aVeI-ll i'n Sllb'stllltl- 1y the same direction fas the 'work itself, as indiroated by the far-rows on the 'cutters |21, v'and ad- ,ia-cent `the work-*pieces n, 'This produces a climb cut effect, *which Itendsy ito 'prevent "the breaking otitiof the "wood fatt'he end of the out.

"I claim as 'iiiy`inverition: l

1. In a machine having "a fra'riieirleans for feeding fa werke-piece in a 'straight 'path acrossv the trarne, 'a vslide reciprooabl'y ymounted for movement transversely -df the path 'ofthe workpiece, 'an farborfsupport on the slidea'nd a outter arbor rotatably 4rriounted thereon *withA 'its axis oblique fto the direction of travel 'riff the workepi'ece, a :drive-'shaft @'for the ifeedin-g Imeans an oscillatory imeniloer V'operaia'ed "fby said'drive shaft, connections from said oscillatory member to-tlie slide for -moving itA bodily during the cutting operation, said connections including a link and means for varying the eiective length of said link to adjust the position of the slide and cutter arbor transversely of the path of movement of thework. i

2.,Inr a machine having-a frame, means for feeding a Work-piece in a straight path across the frame, a driving member for said feeding means,.an arborsupport and a cutter arbor rotatably mounted thereon with its axis oblique to the direction of travel of thevvork-piece, an oscillatory member operated by the drivingmember of the feeding means, and connections from said oscillatory member to the arbor support for reciprocating it bodily in a direction transverse toi the path of movement of the Work, said connections including a link and a crank pin for said link on the oscillatory member, together With"means for adjusting said crank pin radially on` said member to vary the distance through which the arbor support is reciprocated.

3. A machine having a frame provided With a horizontal portion and an upright standard disposed at one side thereof, means including a drive shaft for feeding a work-piece in a straight path across said horizontal portion, a cutter head secured to said upright standard, a slide horizontally reciprocable on said head in a direction transverse to the path of movement of i the Work, an arbor support on said slide. adjustable thereon about a vertical axis, van arbor rotatably mounted on said support on a horizontal axis extending obliquely of the path of `work movement, and means for reciprocating said slide intimedrelation to the movement of the Workcomprising a bell crank device supported on a vertical axis with a link connecting one arm ofr the bell crank to the slide an oscillatory arm f rotatably mounted on said support on a hori-` zontal axis extending obliquely of the path of work movement, and means for reciprocating said slide in timed relation to the movement of the Work comprising a bell crank device supported on a vertical axis With a link connecting one arm of the bell crank to the slide, an oscillatory arm operatively connected to the drive shaft and a link connecting said arm to the bell crank device, together with adjusting means operable to vary the effective length of said arm for altering the movement imparted to the slide in accordance With the angular adjustment of the arbor support thereon.

5. A machine having a frame provided with a horizontalportion and an upright standard disposed at one side thereof, means including a drive shaft for feeding a work-piece in a straight path across said horizontal portion, a cutter head secured to said upright standard, a slide horizontally reciprocable on `said head in a direction transverse to the path of movement ofthe work,

an arbor support -on said slide adjustable thereon about a vertical axis, an arbor rotatably mounted on said support on a horizontal axis extending obliquely of the path of Work movement, and means for reciprocating said slide in timed relation to the movement of the Work comprising a bell crank device supported on a vertical axis with a link connecting one arm of the bell crank to the slide, an oscillatory arm operatively connected to the drive shaft and a link connecting said arm tothe bell crank device, together with adjusting means operable to vary the effective length of said arm for altering the movement imparted tothe slide in accordance with the angular adjustment of the arbor support thereon, a graduated scale indicating the angular adjustmentof the arbor support and a similarly graduated scale indicating the corresponding adjustments of effective length of the oscillatory arm to insure a straight cut inthe Work-piece oblique to its direction of travel.

6. A machine having a frame provided with a horizontal portion and an upright standard disposed at one side thereof, means including a drive shaft for feeding a work-piece in a straight path across said horizontal portion, a cutter head with means for adjusting it vertically on said upright standard, a slide horizontally reciprocable on said head in a direction transverse to the path of movement of the Work, an arbor support on said slide adjustable thereon about a vertical axis, an arbor rotatably mounted on said support on a horizontal axis extending obliquely of the path of Work movement, and means for reciprocating said slide in timed relation to the movement of the work comprising a vertically disposed rock shaft journaled on the standard, a bell crank device splined on said shaft but adjustable along it in response to vertical adjustment of the slide, a link connecting one arm of the bell crank to the slide, an oscillatory arm operatively connected to the drive shaft and a link connecting said arm to the bell crank device.

7. A machine having a frame provided with a horizontal portion and an upright standard disposed at one side thereof, means for feeding a Work-piece in a straight path across said horizontal portion, a pair of cutter heads secured one above the other to said upright standard, a slide horizontally reciprocable on'each of said heads in a direction transverse to the path of movement of the work, `an arbor support on each slide adjustable thereon about a vertical axis, a pair of arbors rotatably mounted on said supports respectively on horizontal axes extending obliquely of the path of Work movement with cutters on said arbors positioned to operate upon the upper and under faces of the work respectively, and means for reciprocating said slides in unison and in timed relation to the feeding movement of the Work, said means comprising a bell crank device journaled on the frame on a vertical axis with links connecting said bell crank device to the slides respectively, an oscillatory arm operatively connected to the drive shaft and a link connecting said arm to the bell crank device. I

8. A machine having a frame provided with a horizontal portion and an upright standard disposed at one side thereof, means including a drive shaft for feeding a work-piece in a straight path across said horizontal portion, a slide horizontally reciprocable on said standard in a direction transverse to the path of Amovement; of the work, an arbor support on said slide adjustable thereon about a vertical axis, a cutter arbor rotatably mounted on said support on a horizontal axis extending obliquely of the path of work movement, and means for reciprocating said slide in timed relation to the movement of the Work comprising a linkage operatively connecting the slide with said drive shaft and including a positive rotary clutch device of two parts separable in axial .direction and having mutually engageable features formed to interlock at a single position of rotative adjustment of said parts with respect to each other to permit operation of the machine without recipro- ,cation of said slide upon disengagement of the clutch and to insure correct timing of the slide movement when the clutch is restored to engaged condition.

9. In a machine having a frame, with means for feeding a work-piece in a straight path across the frame, a cutter head carried by the frame, a slide reciprocable on said head in a direction transverse to the path of movement of the work, an arbor support and an arbor rotatably mounted on said support, means for adjusting said support on the slide about an axis for positioning the axis of the arbor obliquely with respect to the direction of travel of the work-piece, and means for reciprocating the slide in timed relation to the movement of the work during the cutting operation including an oscillatory mechanism provided with adjusting means operable to vary the effective stroke of said mechanism, together with a graduated scale indicating the angular adjustment of the arbor support and a similarly graduate dscale indicating the corresponding adjustment of stroke of the oscillatory mechanism.

10. In a machine having a frame, means for feeding a work piece in a straight path across the frame, a slide reciprocably mounted for movement transversely of the path of the work piece, an arbor support on the slide and a cutter arbor rotatably mounted thereon with its axis oblique to the direction of travel of the work piece and oblique to the direction of reciprocation of the slide, a driving member for the feeding means, an oscillatory member operated by said driving member, and linkage pivotally connected to said slide and to said oscillatory member for moving the slide and the cutter arbor bodily during the cutting operation.

1l. In a machine having a frame, means for feeding a work piece in a straight path across the frame, a slide reciprocably mounted for movement transversely of the path of the work piece, an arbor support on the slide and a cutter arbor rotatably mounted thereon with its axis oblique to the direction of travel of the work piece, a rotary cam actuated in synchronism with the work feeding means, an oscillatory member having a follower engaging the cam to oscillate said member, and pivotally connected linkage transmitting motion from said oscillatory member to the slide, said rotary cam having a contour which produces movement of the slide at a substantially uniform rate in relation to the work feeding movement during the cutting operation.

12. In a machine having a frame, means for feeding a work piece in a straight path across the frame, a slide reciprocably mounted for movement transversely of the path of the work piece, an arbor support on the slide and a cutter arbor rotatably mounted thereon with its axis oblique to the direction of travel of the Work piece, a rotary cam actuated in synchronism with the work feeding means, an oscillatory member having a follower engaging the cam to oscillate said member, and pivotally connected linkage including a rockable member by which motion is transmitted from said oscillatory member to reciprocate the slide and the cutter arbor carried thereby, said rotary cam having a contour which produces movement of the slide at a substantially uniform y rate during the cutting operation.

13. A machine having a frame provided with a horizontal portion and an upright standard disposed at one side thereof, means including a drive shaft for feeding a work piece in a straight path across said horizontal portion, a slide horizontally reciprocable on said standard in a direction transverse to the path of movement of the work, an arbor support on said slide adjustable thereon about a vertical axis, an arbor rotatably mounted on said support on a horizontal axis extending obliquely of the path of work movement, and means for reciprocating saidslide in timed relation to the movement of the work comprising a rotary cam actuated in synchronism With said drive shaft, a bell crank device supported on a vertical axis with a link connecting one arm of .the bell crank to the slide, an oscillatory arm having a follower engaging the said cam for oscillation of said arm by movement of the drive shaft, and a link connecting said arm to the bell crank device, said rotary cam having a contour which compensates for arcuate movements of the oscillatory arm and the bell crank to produce movement of the slide at a substantially uniform rate during the cutting operation.

JU'DSON H. MANSFIELD. 

